/**
 * Copyright (C) 2011 Whisper Systems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.appspot.eusms.mms;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.http.AndroidHttpClient;
import android.util.Log;

import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ByteArrayEntity;
import org.whispersystems.textsecure.util.Util;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;

import ws.com.google.android.mms.pdu.PduParser;
import ws.com.google.android.mms.pdu.SendConf;

public class MmsSendHelper extends MmsCommunication {
    private final static String TAG = MmsSendHelper.class.getSimpleName();

    private static byte[] makePost(Context context, MmsConnectionParameters parameters, byte[] mms)
            throws IOException {
        AndroidHttpClient client = null;

        try {
            Log.w(TAG, "Sending MMS1 of length: " + (mms != null ? mms.length : "null"));
            client = constructHttpClient(context, parameters);
            URI targetUrl = new URI(parameters.getMmsc());

            if (Util.isEmpty(targetUrl.getHost()))
                throw new IOException("Invalid target host: " + targetUrl.getHost() + " , " + targetUrl);

            HttpHost target = new HttpHost(targetUrl.getHost(), targetUrl.getPort(), HttpHost.DEFAULT_SCHEME_NAME);
            HttpPost request = new HttpPost(parameters.getMmsc());
            ByteArrayEntity entity = new ByteArrayEntity(mms);

            entity.setContentType("application/vnd.wap.mms-message");

            request.setEntity(entity);
            request.setParams(client.getParams());
            request.addHeader("Accept", "*/*, application/vnd.wap.mms-message, application/vnd.wap.sic");
            request.addHeader("x-wap-profile", "http://www.google.com/oha/rdf/ua-profile-kila.xml");
            HttpResponse response = client.execute(target, request);
            StatusLine status = response.getStatusLine();

            if (status.getStatusCode() != 200)
                throw new IOException("Non-successful HTTP response: " + status.getReasonPhrase());

            return parseResponse(response.getEntity());
        } catch (URISyntaxException use) {
            Log.w(TAG, use);
            throw new IOException("Couldn't parse URI.");
        } finally {
            if (client != null)
                client.close();
        }
    }

    public static void sendNotificationReceived(Context context, byte[] mms, String apn,
                                                boolean usingMmsRadio, boolean useProxyIfAvailable)
            throws IOException {
        sendBytes(context, mms, apn, usingMmsRadio, useProxyIfAvailable);
    }

    public static SendConf sendMms(Context context, byte[] mms, String apn,
                                   boolean usingMmsRadio, boolean useProxyIfAvailable)
            throws IOException {
        byte[] response = sendBytes(context, mms, apn, usingMmsRadio, useProxyIfAvailable);

        if (response == null) {
            throw new IOException("Got null response!");
        }

        return (SendConf) new PduParser(response).parse();
    }

    private static byte[] sendBytes(Context context, byte[] mms, String apn,
                                    boolean usingMmsRadio, boolean useProxyIfAvailable)
            throws IOException {
        Log.w(TAG, "Sending MMS of length: " + mms.length);
        try {
            MmsConnectionParameters parameters = getMmsConnectionParameters(context, apn, useProxyIfAvailable);
            checkRouteToHost(context, parameters, parameters.getMmsc(), usingMmsRadio);
            return makePost(context, parameters, mms);
        } catch (ApnUnavailableException aue) {
            Log.w(TAG, aue);
            throw new IOException("Failed to get MMSC information...");
        }
    }

    public static boolean hasNecessaryApnDetails(Context context) {
        try {
            ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo networkInfo = connectivityManager.getNetworkInfo(MmsRadio.TYPE_MOBILE_MMS);
            if (networkInfo == null) {
                Log.w(TAG, "MMS network info was null, unsupported by this device");
                return false;
            }
            String apn = networkInfo.getExtraInfo();

            MmsCommunication.getMmsConnectionParameters(context, apn, true);
            return true;
        } catch (ApnUnavailableException e) {
            Log.w("MmsSendHelper", e);
            return false;
        }
    }
}
